I have no idea.. its the only way I enjoy playing Links, with family/friends. I tried multiplayer in PG many times, and its painful. Slow connections with people connecting from across the globe, taking several minutes calculating their shots, players disconnecting after 2 holes because they hit a few bad shots... its crap.
I think I must be one of the lucky ones, I play PG multiplayer twice a week and seldom have issues. I am in the UK and friends I play with online are in Australia. Sometimes 2 sometimes 3 but since the lockdown (in whatever forms) started we have had no failures. I have also played Links a few times and the IP to IP experience is similarly flawless. The point being that both games work online for me even on Windows 10!